package com.ruoyi.service;

import java.util.List;
import java.util.Map;

public interface IStatisticsService {
    List<Integer> lend(String year);

    Map<String, Integer> getLendList(int year,int month);

    List<Integer> getLostCount(String year);

    Map<String, Integer> getMostPopularAuthor();

    Map<Integer, Integer> backLaterStatistics();
}
